| Acronym | Definition |
|---|
| PSTA | Pinellas Suncoast Transit Authority (Florida, USA) |
| PSTA | Pennsylvania State Troopers Association |
| PSTA | Pennsylvania Science Teachers Association |
| PSTA | Professional Scripophily Traders Association |
| PSTA | Palmetto State Teachers Association (Columbia, South Carolina) |
| PSTA | Parent-Student-Teacher Association |
| PSTA | Professional Surfing Tour of America |
| PSTA | Packaging Science and Technology Abstracts |
| PSTA | Periphyton-Based Stormwater Treatment Area |
| PSTA | Periphyton Stormwater Treatment Area (Florida) |
| PSTA | Public Service Training Academy |
| PSTA | Psilostrophe Tagetina |
| PSTA | Palm Springs Teachers Association (Palm Springs, CA) |
| PSTA | Pro Stock Truck Association |
| PSTA | Pennsylvania State Teachers Association |
| PSTA | Pak-Swedish Teachers Association |
| PSTA | Pre-Service Training Academy |
| PSTA | Pre-Service Teachers in Action |
| PSTA | PeopleSoft Training Administration |
| PSTA | Petroleum Services Trading Association |
| PSTA | Pacific Salmon Treaty Act of 1985 |